Welt tempering device



Sept. 11, 1934. ASHWORTH 1,912,970

WELT TEMPERING DEVICE Filed Jan. 28, 1931 3 Sheets-Sheet 1 Wziizass I Sept. 11, 1934.

F. ASHWORTH WELT TEMPERING DEVICE Filed Jan. 28, 1931 5 Sheets-Sheet 2 Sept. 11, 1934.

F. ASHWORTH WELT TEMPERING DEVICE Filed Jan. 28, 1931 5 Sheets-Sheet 3 Patented Sept. 11, 1934 PATENT oFFicE WELT TEMPERING DEVICE Fred Ashworth, Wenham, Mass,

assignor to United Shoe Machinery Corporation, Paterson, N. J., a corporation of New Jersey Application January 28, 1931, Serial No. 511,825

7 Claims.

The present invention relates to welt wetting and tempering devices adapted for use in connection with welt sewing machines, and more particlarly to welt tempering devices of that type in which the welt is caused to pass into and through a body of moistening liquid in such manner that only the portion of the welt at and adjacent the bevel and groove is wetted.

In the manufacture of welt shoes, many differ ent kinds and sizes of welting are used and, consequently, it often becomes necessary for the operator of a Welt sewing machine to change from one size or style of welting to another. To enable this change to be made easily and quickly and without the delay which would otherwise be occasioned by threading a. new piece of welting through the tempering device, applicant has heretofore devised a welt tempering device comprising a purality of independent, interchangeable guides adapted to be alternatively mounted in welt guiding position with relation tothe receptacle containing the moistening liquid, said welt tempering device forming the subject-matter of applicants pending application No. 460,697 filed June 12, 1930. In the welt tempering device disclosed in said application, the individual welt guides were removable bodily from the machine and in substituting one guide for another it was necessary to unfasten the guide, which was in operative position, from its support or carrier, lift it away from the machine, locate the new guide on the carrier, and secure it in position.

The present invention has for its principal object the provision of a simple and efficientdevice which will accomplish the results of the device of applicants prior application without the necessity of bodily removing a guide from the machine and placing another guide in the machine when it is desired tochange from one size or style of welting to another. I I

,With the above and other objects in' view, as will hereinafter appear, the present invention contemplates mounting a series of welt guides permanently in the machine and arranging them so that they are individually and alternatively movable on the machine frame toand from an operative position over a receptacle containing moistening liquid. The welt guides are preferably so constructed and arranged so that they can be threaded, when out of operative position, each with the size and style of welting for'which it is designed and canretain the welts while any guide is being moved into operative position with relation to the moistening "receptacle. In the embodiment of the invention hereinafter specifically described, the welt guides are mounted, side by side, to slide on a guideway to bring each guide in succession into the vertical plane of the moistening receptacle and each guide is movable independently in this vertical plane to an operative position over the moistening receptacle;

The features of invention above referred to and other features consisting of certain constructions, arrangements and combinations of parts hereinafter described and claimed will be readily understood by those skilled in the art from the following description taken in connection with the accompanying drawings in which Figure 1 is a plan View of an apparatusembodying the several features of the invention; Figure 2 is a sectional elevation on the line 2-2 of Figure 1; Figure 3 is a front elevation with, the means for securing the device to the sewing machine table broken away; Figure 4 is a sectional view on the line 44. of Figure 2; Figure 5 is a detail view in side, elevation of one of the welt guides detached from the machine; Figure 6 is a detail sectional plan view of a portion of the device; and Figure- 7 is a vertical sectional. view taken substantially on the line '77 of Figure 1.- V

The device of the present invention is adapted to be secured to the machine table of a welt sewing machine such as is shown and described in the patent to Andrew Eppler' No. 1,076,878 dated October 28, 1913 for Sewing machine. Liquid for moistening the welt is contained withina receptacle 6 and maintained at constant level therein by the usual barometric feed from the container 8 in the form of an inverted. bottle supported within a frame 10 shaped toreceive the top of the bottle in inverted position, the mouth of the bottle resting on the shoulders 12 formed in said frame. A duct 14 conducts the moistening liquid from the bottle 8 to the receptacle 6.

The receptacle 6 is levelled by adjusting the supportingmember 16 which secures the deviceto the'machine table. Said supporting member comprises a triangular horizontal member 18 positioned above themachine table and engaging the table at three points,-first, the groove 20 formed in said horizontal member 18 and adapted to rest upon the rib 22'formed inthe edge of themachine table; second, the adjustable screw 24 positioned to bear upon the rib 22 and maintained in its position relatively to the rib 22 by 'a groove 26 formed'in the under side of said horizontal member; and third, the adjustable screw 28 positioned near the end of said horizontal member 18 and adapted to bear upon the machine table. In order to secure or clamp the supporting member 16 in its desired position upon the machine table, a depending bracket 30 is formed therein, projecting under the machine table and having an adjustable screw 32 positioned in the end thereof and adapted to engage the under side of the machine table, thereby clamping the supporting member 16 securely in position. The desired level of the receptacle 6 is obtained by adjustment of the screws 24 and 28 and is maintained by the screw 32, said screws being held in position by lock nuts threaded thereto. It is obvious that by adjusting the screw 24 the structure is caused to rotate upon the bearing surface 20 and the screw 28, and that by adjusting the screw 28, the structure is caused to rotate upon the bearing surface 20 and the screw 24. By a slight adjustment of said screws 24 and 28, the receptacle 6 may be easily and quickly brought into a level position and may be securely clamped in position by the screw 82.

Welting is guided into a position of partial immersion in the moistening liquid by means of any one of a series of interchangeable welt guides 34 pivotally and slidably mounted upon a horizontal guide rod 36 supported in upstanding lugs 38 and 40 formed in the brackets 42 and 44, said brackets together with the receptacle 6, the frame 10 and the supporting member 16 forming a unitary structure. The rod 36 is parallel to the short side or end of the receptacle 6 and the welt guides 34 are positioned at right angles to the rod 36 and can be slid along the rod to bring the guides successively into the vertical plane of the receptacle.

A Welt guide consists of an arcuate member 46 T-shaped in cross section having the bearing or hub 48 formed in one end to engage the rod 36. The welt guide receives the welt on a roller 50 jolirnaled in lugs 52 projecting from the hub 48. The welt passes over the roller .50 through a notch 51 formed in the rear end of the receptacle,

' thence to a guiding slot 54 formed in a plate 56,

which slot is inclined to the surface of the liquid when the guide is in operative position, thence through an opening 58 formed in a plate 59, which acts asa lateral guide for the welt and causes it to travel in a straight path parallel to the sides of the-receptacle. After passing through the opening 58, the welt passes over the end of the receptacle 6 and under a roller 60 and thence to the welt guiding devices in the sewing machine head. I

The plate 56 is adjustably secured to a plate 62 which, in turn, is adjustably secured to the arcuate member 46. The upper portion'of the plate 62 is slidably secured within a guideway 64 formed by the flanges 66 and 68 in the member 46; The plate 62 is secured in position in said guideway 64 by means of the set screw 70 which passes through the opening 72 formed in the plate 62 and is threaded to themember-46.- In order to provide a sliding adjustment of the plate 62, the opening '72 is made somewhat larger than the set screw '70. Means for angular adjustment of the welt consists of an arcuate slot '74 formed in the lower portion of the plate 62, said lower portion being positioned crosswise of the upper portion of said plate in order to position the plate 56 to receive the welt and conduct it into a position of partial immersion in the moistening liquid. The plate 56 is supported within the arcuate slot '74 by the thumb screw '76 threaded to said plate 56, and the pin 78 fixed to said plate, and is secured at the desired angle by tightening Fig. 4).

said thumb screw. In order that the slot 54 of the plate 56 may assume the same vertical rela tion to the moistening liquid regardless of its angular adjustment, the center of rotation of the plate 62 is located at the center of the slot 54.

A welt guide is yieldingly locked in the vertical plane ofthe receptacle 6 on the rod 36 by means of a circular groove 86 formed on the rod 36 and a ball 82 positioned in an opening 84 formed in the welt guide and adapted to be yieldingly held in contact with said groove by means of a coiled spring 86, one end of which is seated upon the ball 82 and the other end of which is seated upon a setscrew 88 threaded to the opening 84, (see The relative sizes of the groove and the ball 82 are such that the ball 82 projects only slightly into said groove and may be dislodged therefrom by a lateral pressure of the hand upon the Welt guide. The pressure of the ball 82 is sufficient however, to hold the welt guide against horizontal movement on the rod 36 during the rotation of the welt guide in a vertical plane to bring it into operative position over the receptacle.

The free end of the welt guide which is in operative position over the receptacle 6 is supported during the moistening operation by a movable carrier consisting of an arm 90 pivotally mounted upon the base of the frame 10 by means of screws 92 and 94 threaded to the yoke-shaped end of the arm and having pointed ends positioned in recesses in the frame 10. For detachably connecting the welt guide to the arm 90, a latch carrying arm 96 is pivotally mounted in the outer end of the arm 90 and has secured therein a latch in the form of a rod 98 bent into parallel relation to the arm 96 and adapted to be received within a notch 100 formed inthe free end of the welt guide. A spring 102 stretched between pins 104 and 106 in the arms 90 and 96 tends to hold the latch in the notch. The roller 60 mounted on the latch carrier arm 96 forms a means for guiding the welt as it passes over the point of immersion to the welt guiding devices in the sewing machine head.

In devices of this character it is desirable that the welt guide be moved to and from a position to immerse the welt simultaneously with the starting and stopping of the sewing machine. In

porting arrnQO by connections with the starting treadle of the sewing machine, which connections include the link 116 pivotally connected to'the arm 90. In order to vary the degree of immersion of the welt, an adjustable stop consisting of, a screw 118 mounted in the frame 10 is provided for limiting the downward. movement of the welt guide supporting arm 90. The upward movement of the welt guide supporting arm is limited by an adjustable stop screw 120. 1

The welt guides which are not in use are supported in inoperative position upon a rod 122 mounted in the ends of the brackets 42 and 44 and positioned parallel to the rod 36, the welt guides being fully threaded with welts at all times.

When it is desired to exchange welt guides, the latch 98 is swungout of engagement with the notch 100 and the welt guide then in operative position is rotated backwardly until it reclines against the rod 122. The desired welt guide is then moved along the rod 36 until it engages the groove 80, intervening welt guides moving across the groove 80 to the opposite side of the rod 36. The welt is then passed under the roller 60 and the welt guide is rotated until it is positioned Jifto engage the latch 98.

The several features of the invention having been thus described, what is claimed is:

1. In a welt tempering device for use in welt sewing machines the combination, with a receptacle for moistening liquid, of a welt guidecomprising an arm pivotally mounted at one end and extending over the receptacle and provided with welt guiding and supporting means for causing a welt to be partially immersed in the liquid, a carrier for supporting the arm movable to partially immerse the welt and to withdraw the welt from immersion, and a latch for connecting the arm to the carrier.

2. In a welt tempering device for use in welt sewing machines, the combination, with a receptacle for moistening liquid, of a welt guide comprising an arm pivotally mounted at one end and extending over the receptacle and provided with welt guiding and supporting means for causing a welt to be partially immersed in the liquid, a carrier for supporting the arm movable to partially immerse the welt and to withdraw the welt from immersion, a latch for connecting the arm to the carrier, and a roll mounted on the latch to guide the welt in its passage from the device to the welt sewing machine.

3, In a welt tempering device for use in welt sewing machines, the combination with a frame, of a receptacle for moistening liquid mounted on the frame, a plurality of welt guides, each comprising a member provided with welt guiding and supporting means for causing a welt to be partially immersed in the liquid when the member is in operative position with relation to the receptacle, and means for supporting said members continuously on the frame, said means being arranged to permit a relative movement of said guides on the frame to substitute one for another in substantially the same operative welt guiding position.

4. In a welt tempering device for use in welt sewing machines, the combination with a frame, of a receptacle for moistening liquid mounted on the frame, a plurality of welt guides, each comprising a member provided with welt guiding and supporting means for causing a welt to be partially immersed in the liquid, a carrier for supporting a welt guide mounted for movement to partially immerse the welt and to withdraw the welt from immersion, and means for supporting said members on the machine frame while permitting any member, to be moved into operative position with relation to the carrier and to the receptacle without removing any of the other members from the frame, and means for connecting a welt guide to the carrier.

5. In a welt tempering device for use in welt sewing machines the combination with a frame, of a receptacle for moistening liquid mounted on the frame, a plurality of welt guides, each comprising a member provided with welt guiding and supporting means for causing a welt to be partially immersed in the liquid, means for supporting said members on the machine frame comprising a guideway on which the members are mounted to slide to bring each member in succession into the vertical plane of the receptacle, and

means for moving the member which is in the vertical plane of the receptacle towards and from a position in which the welt supported by said member is partially immersed in the liquid.

6. In a welt tempering device for use in welt sewing machines, the combination with a frame,

swing independently in this vertical plane on said guide rod as a pivot to the operative position over the receptacle in which the welt is partially immersed in the liquid.

'7. In a welt tempering device for use in welt sewing machines, the combination with a receptacle for moistening liquid, of a welt guide comprising an arm pivotally mounted at one end and provided with welt guiding and supporting means for causing awelt to be partially immersed in the liquid, and means for moving the welt guide about its pivot to partially immerse the welt and to withdraw the welt from immersion.

FRED ASHWORTH. 

